Upgrade to 3.29

Update V8 to 3.29.88.17 and update makefiles to support building on
all the relevant platforms.

Bug: 17370214

Change-Id: Ia3407c157fd8d72a93e23d8318ccaf6ecf77fa4e
diff --git a/src/libplatform/task-queue.h b/src/libplatform/task-queue.h
new file mode 100644
index 0000000..eb9d698
--- /dev/null
+++ b/src/libplatform/task-queue.h
@@ -0,0 +1,47 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_LIBPLATFORM_TASK_QUEUE_H_
+#define V8_LIBPLATFORM_TASK_QUEUE_H_
+
+#include <queue>
+
+#include "src/base/macros.h"
+#include "src/base/platform/mutex.h"
+#include "src/base/platform/semaphore.h"
+
+namespace v8 {
+
+class Task;
+
+namespace platform {
+
+class TaskQueue {
+ public:
+  TaskQueue();
+  ~TaskQueue();
+
+  // Appends a task to the queue. The queue takes ownership of |task|.
+  void Append(Task* task);
+
+  // Returns the next task to process. Blocks if no task is available. Returns
+  // NULL if the queue is terminated.
+  Task* GetNext();
+
+  // Terminate the queue.
+  void Terminate();
+
+ private:
+  base::Mutex lock_;
+  base::Semaphore process_queue_semaphore_;
+  std::queue<Task*> task_queue_;
+  bool terminated_;
+
+  DISALLOW_COPY_AND_ASSIGN(TaskQueue);
+};
+
+} }  // namespace v8::platform
+
+
+#endif  // V8_LIBPLATFORM_TASK_QUEUE_H_